Type-writer and type-bar mechanism therefor.



H. ETHEBJDGB.

TYPY; wm'rm AND TYPB BAR MEGHANISMTHEREYOR.

APPLICATION FILD MAY 23,191'1.

Patented Nov. 24, 1914.

1,118AO5. I v

I I I I I I I I I I Wizwsses.

I i ITE safrnsrrr ornron.

HER'BER'' ETHERIDGE, OF WIMBLEDON PARK, ENGLANI), ASSIGNOR T0 BAR-LOCK` I TYPEWRITEB COMPANY LIMITED, OF LONDON; ENGLAND.

TYPE-WRITER AND TYPEBAR MECHANISM THEREFOR.

miaaos.

To all 'whom it may com-em Be it known that I, Hnnenn'r E'rnnnioon, a'subject bf the King of England, residmg at Wimbledon Park, Surrey, England, have inventedcertain new and useful Improvements in Il-Type-'Writers and Type- Bar Meehanism 'lherefor, of which the followin` is a specification.

his' invention is for improvements in or relating to` typewriters and type-bar ni'echanism wherem sub-levers are employed for the type'bar mechanism and the arrangement of the' parts is such that the points at whicheach; sub-'level' and its type bar are connected by a link fall in the same straight line as the point of pivoting of the sub-lever 'when the parts are in the inoperative position; thisarrangement gives an case of action and wdead return of the levers c. a return which is free from forward rebouncl. Accordin to the present invention each snbdever 'ta es the form of a bell-erank having its arms approximately at right-angles I to to each other; one arm being linked to the type-bar and the other arm connected to the key-level' by a link which, when the parts are in the position 'of rest, lies approximately at right-angles to its arm.

To render the writing easily visible, the type-barswhere arranged'to stand up between the platen and the operator are dis' posed at 'an angle of about 45 to the liorizontal and each key-level' is pivoted at the back of the machine and is slopcd down' .Ward from the point of pivoting to the link 'this invention are illustrated.

Like letters indieate like parts in the drawing. i p

' Theftype-bars A, 'one only' 'of which is shown, are arranged in one or more con- 'centric semi-circles inclosed by a Semi-ein cula'rframe tjlin the well-known nianner,

specification o! Letters Patent.

Application flled May 23, 1914. Serial Na. 840,474.

'ach type-bar is pivoted -at and a short arm O. The sub-level' is piv* otedat C and its long arm isconnected at O' to the link B and its short arm at C1 to '65 a link D lying at right angles to the ann C2., The other end of the link D is pivoted at' D1 to a key-lever E. The key-lever is bent at El so that the bacleportion can extend u wardly and rcarwnrdly from the point 1. w here the link D is pivoted, to the pivot-bar J-` which receives the ends of the key-levers E and is situated at a higher level than the Pivot-points A2 of the lowest of the typebars. This disposition insures Vertical com- )actness of the machine. Each key-level' is cept in place against the pivot-bar and also brought back to its inoperative position after operation by a spring E3.

It will be seen that the pivot-points A, O* and Ca are approximately in line when the type-bar mechunism'is in the inoperati've position; furthcr, the part of the key-le'ver E which lies between the pivot-point DI und the pivot bar E2 lies ap `)roximately at righta-ng'les to the type-bar when the parts are m the inoperative position; also the link D lies approximately at right-angles to this hack portion of the key-lever. Further, the arms C1, C of the sub-level' are about at rightnngles to each other and' the link B 1s in line with the arm C1 and its point of connection A* to the type-bar A is on a line which in the direction of the pull for pro' ducijng the str-oko is nearer to the pivot point A2 nt the start of the stroke than it is during the development of the stroke, but the pointl A4 finally comes back nearly to the'same line as shown by the 'dotted position indicated in the drawing, and the arm C1 and link B are then nearly 'at right-ang'les to each other. It is found that this arrangement of parts allords an easy start and gives acceleration to the type-'bar during the stroke, the acceleration being greatest at the time of sti'iking the platen.

Machines are already made in which the levcrnge is such us to give an easy start and an accelerated motion (luring the stroke, but it is helieved that this particular mechanism i that they slope down from the piyot-barv gives a more satia-:ractori'A heretofore been' prcdm canted position of the sein A1 and of the type-here therein, enables the writing to-bc easily scen by theoperator. The object of forming the key-levers to the point of connection With the link l), is to bring this part of the lever'to a position at right-angles with the type-bar, as ,a'better movement of the'type-bars is found to result than is. the case When the key-levers are horizontal and the type-bara are tiltedinto the position shown; this especially applies to such type-bars as are toward-.the ends of the seIni-circular frame A1.

lierther,iv the ft Will be seen thatthe key-level' link D i and arni C2 of the sub-level' C are all in the best position for pulling at the start, but the arm C1 is not in the best position relativcly to the type-bar, but it can nevertheless swing' out 'easily at the start Witl out imparting such inovement to the typebar, so that an easy start 'seil'ected, and, as

it swings out it is brought to a position Where it 'gets greater power over the typeba-r and at the same time increases the speed of inovement of the latter. Thev construction moreover. has the further advantage common to type-bar mechanism of this type that the Pivot-point A* being in line With the Pivot-points Ctand C3 the type-bar is locked back When 'in the inoperative position, that is to say, it is not easy to move 'the type-bar. forward by thrnst applied to the type end of the type-bar. From this it results that there is very little rebound with the type-bars as they strike the stop A1* on the frame A1 so that a dead return to the inoperative position is produccd. To accommodate this type-bar mechanism it is found convenient to provide the frame of 'the machine with a front ption F which slopes upward from the operator and constitutes the key board part of the machine, and then from this a horizontal portion F1 which carries the semi-circular frame A1, and from I that portion an upwardly and rearwardly sloping part wherein the plnten-carriage G Vis mounted.` The runners G1 of the platencarriage' are preferably tilted to accommodate the back ends of the key-levers E and lie on this upwardiy and renrn'ardly sloping part of the frame, and the back of the nm,- chineli'tself is extended upward and'covef'cd in by a plate H. The part 1-l1 corresponds to the back portion of the frame as usnally provided on typewritcrs, ;and it will be seen that the plate ll extends np considerably beyond this and is turned over at the top 'to meet the base for the runncrs of the g platen-carriage.

Tllf'hat 1 claini as niy inyention and desire to sccurelby Letters Patent is 1--` l.l In a typ'ewrlter the combination of, a

action than, has' i-oircnlar frame.

sub-levers one for each type-bar pivoted on the frame, 'links each connecting one arm of a sub-level' to a type-bar each of said links lyingin a straight line With 'the axis of piroting of its sub-lerer when said type-bar 'is in its inoperative position and being,r connected to the type-bar at a point which is above and relatively near to the axis of pivoting of the type-bar the proportions of the parts being such that suiicient movement lis permitted them to bring this point of connection of the type-bar approximately as much below the axis of pivotii'ig at the' end of the stroke as it was above. the said axis at the beginning of the stroke, a second link one for each sub-level' connecting that arm of the sub-levernotengaged by the previously mentioned link to the key-level' allotted to that type-bar, this second link lying, when the type-bar is in'operative, Aapproinniatcly atfrght angles to the sub-lever arni to which it" is connected, substantially as set forth.

2. 111 a typewriter the combination of, a frame, a lurality of type-bars pivoted thereon an so montcd that when in the inoperative position they lie with their longitudinal axes at an angle of approximately 4z5 to the horizontal, key-levcrs pivoted on the frame one for each type-bar the point of pivoting of each level" being at the back of the machine, right-angled bell-crank sublevers one for each type-bar pivoted on the frame, links each connecting one-arin of'a sub-lever to a type-bar each of said 'links lying in a straight 'line With the axis of pivoting of its sub-level' When said type-bar is in its inoperative position and a second link one for each sub-lever connecting that. arm of the sub-level* not engaged by theflink and the link itself .lying, whenthe typev bar is inoperative, approxlmatelyat rightangles to the sub-lever arm to .which it is connected, substantially as' set forth.

3/111 a typewritcr the 'combination of, a

frame having a scgnicntal support-thereon,

a plurality of type-bars piyoted 011 the segment-al support and so mounted that When in the inoperative position theyl llie with their longtudinal axes at an angle, of approximatcly 45 to the -horizontah key-let vers pivotc-d on the frame one' for each typebar, the point vof piv'oting 'of each leven being at the back of the machine and above the pivot point of'the lowest type-bar, rightanglecl bell-crank sub-levers one for ''each type-bar pivoted Vonv the frame, 'links each line with the axis of pivoting of itssublevel' when said type-bar is in its inoperative position, and a second link one 'for each sublever connecting that arm of the sub-level' not engaged `by the previonsly nientioned link to lthe .key-level' allotted'to that typebar, each of thesaid key-levers being sloped down 'from its own point of 4pivoting to the point of its connection With this link and said sloping portion lying approxiinately at right angles to the link and the link itsel'E 'lying when the'type-'bar is inoperative approximate'ly at right-angles to the suli-lever arm to which it is connected, snbstantially as set forth.

4:.,111 a typewriter the combination of, a frame, a. plurality of type-hars pivoted thereon and so' mo'unted that when in the inoperatii'e position they lie with their longitudinal ax'es at an angle ol` approximately -5 to the horizontal, key-lercrs pivoted on the frame one 'for each type-bar the point of pivoting of each lerer being at 'the back of the machine, right-angled l i ll--crank snblevers one for each type-bar pivoted on 'the frame, links each crniniei'ting one ari'n ot' a sub-level' to a type-bar each of said links lying in a straight line with the axis'of pivoting of its snb-lever when said typebar is in its inoperative position, a second link one. 'for each sub-level' connectingr that .ai-in ot the sub-level.- not engaged by the prei'ionsly-mentioned link to the key-lm'eiI allotted' to that type-bar, each of the said key-levers being sloped down from its own point ot pivoting to the point of its connection, with this link and the said Sloping portion lying' approximately at .right angles to the linknnd the link itscl't lying when the type-bar is inoperatii'e approximately at l'ight-angles to the snb-lever arln to which it, 'is connected, and. runners for a platen-carriage monnted above the sloping portion ol the key-levers, the piano of the rinmersl being tilted so that the whole 'platen-carriage is tilteil forward to accommodate the pivoted ends olf the lwy-levitra, snbstantially as set forth. y

5. ln a tylwwriter the combination of, a frame, a phn'ality ot type-bars pivoted thereon and so monnted that whenin the inoperative position they lie with their longitndinal. axes at an angzle ol' approximately to the horizontal, kcy-lex'ex's piroted,C on the 'frame one tor each tyl'ie-har the point of pivoting of each lever being.: at the back of the machine, rigl'it-anrleil hell-crank sub-- levers one for each type-bar pii'oted on the frame, links each ('onneeting one arm of a sub-level' to a type-bar each ol'l said links lyinp,r in a straight line with the axis of pi'roting of its sub-level' when said type-bar is in its inoperative position, a, second link one for each sub-lever connecting that arm of the sub-level' not engaged by the previously-inentioneil link to the key-level' allotted to that type-bar, each of the said key-levers being sloped down from its own point of pivoting to the point ot its connection with this link and said sloping portion lying approxiinatel y at right anglesto` the link and the link itself lying when the type-bar is inoperative approximately at right-angles to the sub-lever arin to which it is connected, and a back covering-plate (H) which is raised relatively to that partl of the machine which is iininedia-tely' in front of 1t to aceommodate the upwardly sloping ends of the key-levers, substantially i as set forth.

In a typcwriter the combination of, a l'ranie, a plnrality ot type-bars pivoted thereon and so inounted that when in the inoperatii'e position they lie with their longitndinal axes at an angle ot' approxiniately 45 to the hoi'izontal, key-levers pivoted on the frame one for each typehar the point of pivoting of each le'ver being' at the hack of the machine, right-angled bell-erank snh-levers one for each type-bar pivoted on the frame, links each eonnectinl' one arm of a snh-levcr to a type-bar each ol" Isaid links lying' in a straight line with the axis ot piioting' of its sub-level' when said type-bar in its inoperative position, a second link one ;tor eiich sub-level' conneeting that arm ot the sali-level' not en- L'aireil by the previonsly-xnentioned link to the key-level' allotted to thattype-bar, each of the eaid key-levcrs being sloped down 'l'ron'i itsl own point of pivoting to the point ot' its connection with this link and said slopingy portion. lyingz; approximately at right-angles to the link and the link itself lyinr when the type-bar is inoperative approxin'iately at right-angles to the sub-level' a rm to which it is ",onne;ted, and side walls to the machine `nhieh slope npward from the front to the hack olf the key-board and are then rontinned along a horizontal plnne in which plane the support :for the typebars is nionntoil snbstantially as set forth.

7. ln a typewriter the coinhinationof, a frame, a plnrality of type-bars pivoted thereon and so inonnteil that when in the inoperatiu'` position they lie with their long'itndinal axes at an angrle of approxiinately ln to the horizontal, key-leversi pivoted on the l'ranie one 'l'or each type-bar the 'point ol' |i\'otin;r olI each lever hein;r at the back ol' the machine, right-angled hellcrank snb-levers one 'for each type-bar |i\'otol on the frame, links each coi'inecting one arninoif a sub-[ever to a type-bar each ol' said links lyi'ng' in. a straight line with the :ixis ol' pivoting ofiits sub-level' when said type-bar is in its inoperative position, a .second link one for each sub-level' confrom its own point of pivoting to the point .of its connection with this link and. said:

sloping' portion lying epproximately at right-angles to the link and theelink itsel lymg when the type-bar is ino eratve ap-` proximately at right-angies to t e sub-level' erm'to which it is connected, anel side Walls to the machine which slope upward from the front to the back of the key-board. end

l:tre then continue along a hoi'izontel piano mteiea y in Whi'eW'phne ,theeflpport for the tjeef" beta is ounted after which it provide ends for e boizizig: to; the back ends of the key-levei's the typearriage mounte en the-pierwoie this last-mentioned-slopingapoz'tiom sub eloped up to ;tccommodate and stantiailyas set 'forth In testimony whereo' I vkawe, eiggie my name to this specifietionirti theresenoev of two subsoi'ibiiigiwitiaes-isee.v

' HERBERT E'HERGE.

Wi'tnesses:= i o 'HARBYR Bawmy J. Cowmo.. 

